Amongst the record-breaking antics and birthday celebrations, the new 911 Turbo may have slipped by almost unnoticed. Thankfully, Porsche knew better, as a white 911 Turbo S joined Matthias Müller and Walter Rohrl on stage at the Porsche press conference yesterday.

The new 991-type Turbo is powered by a 3.8 litre twin-turbocharged engine, turning out 520bhp, while the 911 Turbo S gains an extra 40bhp. The latter can sprint to 62mph in 3.1 seconds, while the former still reaches the same mark in a frankly ridiculous 3.4 seconds (3.2 seconds with Sport Plus).

The PDK-only cars are the subject of our new issue 105, now on sale in store and online. Inside, we provide the definitive first drive of both the new Porsche 911 Turbo and the Turbo S.

We also discover if the Turbo S is worth the extra premium over its standard brother. After all, with all the improvements to the base model, is the Turbo S’s £140,852 price tag worth it?